This is just boring programer stuff, but I had a function that'd sometimes run a couple hundred times a frame and it was generating some garbage. Not enough to be a problem, but still enough to stand out compared to other functions.

I redesigned the function to fix that. Now it produces zero garbage, runs significantly faster, and produces better results! I don't care if an expert programer could have made this improvement in 5 minutes, it's impressive for me haha.